<div class="uml">
  <ul class="mbt">
    <% participations.each do |participation| -%>
    <li class="mbtl"><%= avatar_for participation.user, "large" %></li>
    <li class="mbtrdot"><%= link_to_user_page participation.user, :target => '_blank' %> 要参加 <%= link_to_event_page participation.event, :target => '_blank' %></li>
    <% end -%>
  </ul>
</div>